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    Identifying chemicals by observing physical/chemical behavior

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    Questions 9 - 11:

    a) COsub3^2-
    b) MnOsub4^-
    c) NHsub4^+
    d) Ba^2+
    e) Al^3+

    Assume that you have several unknowns each consisting of an aqueous solution of a salt that contains one of the ions listed above, which ion must be present if the following observations are made of that unknown?

    9) the solution is colored.

    Ans A, B, C, D or E

    10) An odar can be detected when a sample of solution is added drop by drop to a warm solution of sodium hydroxide.

    Ans A, B, C, D or E

    11) a precipitate is formed when a dilute solution of Hsub2SOsub4 is added to a sample of the solution.

    Ans A, B, C, D or E

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    SOLUTION This solution is FREE courtesy of BrainMass!

    9) the solution is colored Ans. b) MnOsub4^-

    example KMnO4 Potassium permanganate

    10) An odar can be detected when a sample of solution is added drop by drop to a warm solution of sodium hydroxide.
    c) NHsub4^+
    Ammonium hydroxide is formed with a smell

    11) a precipitate is formed when a dilute solution of Hsub2SOsub4 is added to a sample of the solution
    d) Ba2+
    when H2SO4 is added to BaCl2 white precipitate of barium sulphate is formed

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    © BrainMass Inc. brainmass.com December 24, 2021, 4:54 pm ad1c9bdddf>
    https://brainmass.com/chemistry/general-chemistry/identifying-chemicals-observing-physical-chemical-behavior-14985

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